<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .mv{
            width:300px;
            /*旋转
            正数顺时针旋转，负数逆时针旋转
            */
           /* transform:rotate(23deg);*/
            transition:transform 2s;
        }
        .mv:hover{
            transform:rotate(45deg);
        }
    </style>

</head>
<body>
<img class="mv" src="/static/w2/images/1.jpg">
</body>
</html>